Method of mounting electrical condensers



Dec. l1, 1945. D. R. CLEMONS METHOD OF MOUNTING ELECTRICAL CONDENSERS Original Filed Oct. 24, 1941 2 Sheets-Sheet l Y IVENTOR.

A TTG/MMV Dec. l1, 1945.` D. R. cLEMoNs METHOD OF MOUNTING ELECTRICAL CONDENSERS 2 Sheets-Sheet 2 Original Filed Oct. 24, 1941 INVENTOR. A. 'EMo/vs @2y/7 @74;

Patented Dec. 1l, 1945 METHOD F MOUNTING ELECTRICAL v CoNDENsERs l Dale R. Clemons, Riverside, lll., assignor to Western Electric Company, Incorporated, New York, N. Y., a corporation of New York Original application October 24, 1941, Serial No. 416,287. Divided and this application March 12, 1943, Serial No. 478,893

2 Claims. (Cl. 29-25.42)

This invention relates to a method yof mounting electrical condensers and the like, and is a division of my copend ng application, Serial No. 416,287, filed Octobe .24, 1941.

Electrical condensers, particularly those of the type which are sealed in metal containers, are sometimes attached to flat supporting members or mounting plates by means of mounting studs which are anchored in the sealedy covers of the ccndenser'containers and project perpendicularly therefrom. It is essential, in some instances, that such condensers be accurately aligned with respect to the supporting member or mounting plate to present a pleasing appearance 'and/or to permit the mounting of a plurality of condensers on close centers. However, the presence of the usual soldered terminal posts and soldered filling holes on the condenser covers usually present irregular surfaces surrounding the mounting studs which, heretofore, has rendered it difilcult and costly to properly align` such-condensers with respectl to the mounting plates.

An object ofthe present invention is to provide an improved vmethod of mounting electrical condensers andthe like, whereby the above mentioned objections are eliminated.

f' In accordance'with the above object, one embodiment of the invention contemplates the provision of a method of mounting an electrical condenser on a flat surfaced support, in which a flat surfaced mounting block or embossment is molded or cast directly on the condenser, after which the condenser is attached to the `support with the ilat`surface of the embossment contacting and flush with the flat surface of the support.

A more complete undertsanding of the method of the present invention may be had from the following detaileddescriptionwhen read in conjunction With the accompanying drawings, in which Fig. l is a vertical sectional view of a molding fixturel by means of which the method may be practiced, the section being taken on line I-I ofFig. 3: m

Fig. 2 is a side elevational view of the xture;

Fig. 3 is a plan view thereof;

Fig. 4 is a plan view of the mold and gate member, the latter being shown in the open position; y Fig. 5 is a front elevational view showing the manner in which the fixture is held in a tilted position upon an electromagnetically vibrated plate during the pouring of the molten metal into the mold cavity;

Fig. 6 is a perspective view of an electrical condenser adapted to be provided with a cast mount,-

to a mounting plate.

ing block by the method of the present invention;

Fig. 7 is a perspective view of an electrical conf denser that has been provided with a cast mounting block by the method of the invention; and

Fig. 8 shows several such condensers attached Referring now to the drawings, there is illustrated in Fig. 6 an electrical condenser I0 of a well known type employed in telephone communication systems.` The illustrated condenser comprises an outer metal casing or container Il having a sealed-'on cover I2 to which are soldered the two terminal posts I3I3. The cover is provided with the usual filling hole I5 which is sealed by a globule of solder I6. A mounting stud I1 is anchored to the cover for use in attaching the condenser to a supporting panel or mounting plate I8, as shown in Fig. 8.

In accordance with a feature of the present invention, a flat surfaced embossment or mounting block I9 (Fig. 7) is molded or cast directly on the cover, adjacent to and surrounding the mounting stud I1. This mounting block is preierably composed of a lead-antimony-tin alloy, but

other alloys, as well as various non-metallic mold ing materials, may be used. It is necessary, only, that the mounting block be firmly attached to the condenser cover and that it have a flat outer sur"- face 20 for engaging and cooperating with the mounting plate to maintain the condenser substantially perpendicular to the mounting plate, -as shown in Fig. 8. I

A preferred form of molding fixture for casting the molding block on the condenser cover is illustrated in Figs. 1 to 5, inclusive, of the drawings. It comprises a mold block 22 which is removably attached by screws 23 to the base of an L-shaped frame 24, the latter being attached by the same screws to a supporting plate 25. This plate has four downwardly turned flanges 26, 26 which serve -as supporting legs for the fixture when placed on a table or work bench.'

The condenser is placed in the molding fixture in an inverted position,` as shown in broken lines in Fig. 1, and it will be noted that the mold block 22 of the fixture is formed on its upper surface with a depression 28 which conforms to and accommodates the cover of the condenser. Within this depression and centered with respect thereto is a mold cavity 30 (Figs. 1 and 4) which is shaped to conform to the shape of the embossment or mounting block to be cast on the condenser cover, and the bottom of the mold cavity is flat so as to form a fiat mounting surface on the cast mounting block.

depression or filling trough 31 is provided in the upper surface of the mold block and a slot 33 in the adjoining wall of the mold cavity connectsl the cavity with the trough.

A gate member 40 is hinged or pivoted on the protruding ends of a' iixed horizontal pin 4i mounted in the mold block. This gate member is provided with a suitable handle 42 by means of which it may be opened and closed. 'I'he gate is formed with a tapered groove 84 which terminates at its smaller end in a slotted projection 45. When the gate is closed, as shown in Figs. l, 2 and 3, the slotted projection I! cooperates with the slotted wall of the mold cavity to provide an inlet opening I1 (Fig. 2) for the mold cavity, and it will be obvious that the tapered groove 4l of the gage is adapted to cooperate with the tapered depression 31 in the mold block to guide and direct the molten metal toward the inlet opening 61.

To theupper end of the upstanding portion of frame 24, there is attached a suitable vhandle 50 and a channeled guide or gauge block The gauge block is provided on opposite sides thereof with two guide channels 53 and 5l for accommo dating the body portion of the condenser and these guide channels are of different widths so that by simply reversing the gauge block, the fixture may be adjusted to handle condensers of two diierent sizes.

The frame 2t is of channel cross section and an ejecting bar is vertically slidable therein behind iixed retaining pins I-SL as b'est shown in Fig. 1. This ejecting bar has a horizontal outwardly extending handle portion 33 at its upper end and a horizontal inwardly extending arm 64 at its lower end. When the ejecting bar is manually lifted by means of the handle portion 63, the arm Si! is adapted to press upwardly on'the stud i1 of the condenser to lift the condenser out of the mold. v

An auxiliary ejector in the form of a lever 36 is provided for cooperating with ejecting bar 60 to remove the condenser and the attached cast mounting block from Vthe mold. 'I'his ejector lever is pivoted on the horizontal pin Il and operates in .a slot 'l in the mold block. A coil spring 63 is arranged to press upwardly against the outer end of the lever so that the inner end thereof is normally held in its retracted position within the slot 61. When in this position, the upper surface of the lever is ilush with the bottom of the iiiling trough 31 of the mold block.

aecomo In the operation oi the above described molding xture, a condenser is placed therein in an -inverted p0sition, as shown in broken lines in Fig. l, with` the mounting stud I1 inserted in the apertures 32 and 33 and with the body of the condenser lying in the channel B3 of gauge block 5| The condenser is thus positioned perpendicular to the ilat bottom surface of the mold cavity 30. With the condenser so positioned, the gate is closed and the'iixture is held in a tilted position upon a vibratory plate 10, as shown in Fig. 5. By means. of an electromagnet 12, the plate is vibrated while molten metal is poured into the mold cavity through the inlet opening I1 by way of the illling trough 31. The iixture is vibrated by the vibrating plate, thus forcing the molten metal into all corners of the mold cavity.

A suilicient amount of molten metal is poured into the mold to completely illl the mold cavity and then rise in the lling trough 31 to the level indicated at 13 in Fig. 5. After the metal in the mold has been allowed to set, the iixture is removed from the vibrating plate, the gate i is out of the mold while the outer end of ejector lever 68 is pressed downwardly so that the inner end thereof is projected upwardly to eject from the filling trough 31 the protruding burr formed on the cast block by the overilow of metal into the filling trough. This protruding burr is then removed by clipping it oil with close cutting pliers, thus leaving attached to the condenser cover a cast mounting block I9 (Fig. '1) having smooth side edges and a flat surface 2li for engaging and cooperating with the mounting plate to maintain l the condenser perpendicular with respect to the mounting plate, as shown in Fig. 8.

It will be obvious that the invention is not limited to the specic embodiment thereof herein illustrated and described, but is capable of other applications within the scope of the appended claims.

What is claimed is:

1. A method of making an electrical device having a at mounting surface thereon, which comprises placing an electrical unit in a container, securing a closure member to the container and molding directly on said closure member a mounting block having a ilat molded sur-4 face.

2. A method of making an electrical devic having a at mounting surface thereon, which comprises placing an electrical unit in a con'- tainer having substantially parallelv side walls and an open end, securing a, closure member to said open end, and molding directly on said closure member a mounting block having a iiat moulded mounting surface substantially perpendicular to said side walls.

DALE R. CLEMONS. 

